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Neo4j Database Assignment Help, Project help, Homework Help | Sample Paper


// Execute these queries to populate your graph // PART1 : Creating Nodes (Vertices)


CREATE (us1:User {name:"Alex"}), (us2:User {name:"Jia Li"}), (us3:User {name:"Ramesh"}), (us4:User {name:"Jennifer"}),

       (us5:User {name:"Newton"}), (us6:User {name:"Mozart"}), (us7:User {name:"Picasso"}), (us8:User {name:"Elizabeth"});

CREATE (po1:Post {heading:"Trip to Indy", content:"Had fun at Central Canal"}), 

       (po2:Post {heading:"Celebrated my Birthday", content:"It was great to have so many friends at my place"}), 

       (po3:Post {heading:"Tiring Day!", content:"Eagerly waiting for Thanksgiving break!"}), 

       (po4:Post {heading:"Visiting LA", content:"Looking forward to a great trip!"});

CREATE (po5:Post {heading:"Boiler Up!", content:"Going to the game tomorrow"});

CREATE (po6:Post {heading:"Studying!", content:"Long homework!"});

CREATE (po7:Post {heading:"Sleepy!", content:"had to stay late to submit 348 project on time"});

CREATE (la1:Location {name:"West Lafayette"}), (la2:Location {name:"Chicago"});

CREATE (ca1:Category {name:"Travel"}), (ca2:Category {name:"Celebration"}), (ca3:Category {name:"Festival"}), (ca4:Category {name:"Other"});


// PART 2 : Creating Relations (Edges) // IMPORTANT NOTE on the relations



// 1) Each user can write zero or more posts (Wrote edge)

// 2) Each post can have only one associated location (PostedFrom edge)

// 3) Each post can be categorized under 1 or more categories (CategorizedAs edge)

// 4) Each post can have 0 or more comments from a given user (Commented edge)

// 5) Each post can only have 0 or 1 rating from a given user (Rated edge)

// 6) Each user can be followed by 0 or more users (Follows edge)

Match  (us1:User {name:"Alex"}), (us2:User {name:"Jia Li"}), (us3:User {name:"Ramesh"}), (us4:User {name:"Jennifer"}),

       (us5:User {name:"Newton"}), (us6:User {name:"Mozart"}), (us7:User {name:"Picasso"}), (us8:User {name:"Elizabeth"}),

       (po1:Post {heading:"Trip to Indy", content:"Had fun at Central Canal"}), 

       (po2:Post {heading:"Celebrated my Birthday", content:"It was great to have so many friends at my place"}), 

       (po3:Post {heading:"Tiring Day!", content:"Eagerly waiting for Thanksgiving break!"}), 

       (po4:Post {heading:"Visiting LA", content:"Looking forward to a great trip!"}),

       (la1:Location {name:"West Lafayette"}), (la2:Location {name:"Chicago"}),

       (ca1:Category {name:"Travel"}), (ca2:Category {name:"Celebration"}), (ca3:Category {name:"Festival"}), (ca4:Category {name:"Other"})

CREATE (us1)-[:Wrote]->(po1), 

       (us2)-[:Wrote]->(po2), 

       (us3)-[:Wrote]->(po3), 

       (us4)-[:Wrote]->(po4), 


       (po1)-[:PostedFrom]->(la1), 

       (po2)-[:PostedFrom]->(la1), 

       (po3)-[:PostedFrom]->(la1), 

       (po4)-[:PostedFrom]->(la2),


       (po1)-[:CategorizedAs]->(ca1), 

       (po2)-[:CategorizedAs]->(ca2), 

       (po3)-[:CategorizedAs]->(ca3), 

       (po4)-[:CategorizedAs]->(ca1),

       (po3)-[:CategorizedAs]->(ca4), 


       (us1)-[:Commented {content: "Did you go to the zoo?"}]->(po1),

       (us3)-[:Commented {content: "Thanks for the party!"}]->(po2), 

       (us4)-[:Commented {content: "See you soon!"}]->(po3), 

       (us5)-[:Commented {content: "Have fun!"}]->(po4), 


       (us1)-[:Rated {rating:5}]->(po4),

       (us3)-[:Rated {rating:3}]->(po2),

       (us4)-[:Rated {rating:1}]->(po1),

       (us5)-[:Rated {rating:2}]->(po1),

       (us3)-[:Rated {rating:5}]->(po4),

       (us7)-[:Rated {rating:5}]->(po4),

       (us8)-[:Rated {rating:4}]->(po1),

       (us4)-[:Rated {rating:4}]->(po3),

       (us4)-[:Rated {rating:1}]->(po2),

       (us2)-[:Rated {rating:1}]->(po1),


       (us1)-[:Follows]->(us2),

       (us2)-[:Follows]->(us3), 

       (us3)-[:Follows]->(us4), 

       (us4)-[:Follows]->(us5), 

       (us5)-[:Follows]->(us6), 

       (us6)-[:Follows]->(us7), 

       (us7)-[:Follows]->(us8), 

       (us2)-[:Follows]->(us8), 

       (us4)-[:Follows]->(us8);


 Match (po5:Post {heading:"Boiler Up!", content:"Going to the game tomorrow"}),       

       (po6:Post {heading:"Studying!", content:"Long homework!"}),

       (po7:Post {heading:"Sleepy!", content:"had to stay late to submit 348 project on time"}),

       (us1:User {name:"Alex"})

 Create (us1)-[:Rated {rating:5}]->(po5),

        (us1)-[:Commented {content: "Keep up the good work"}]->(po6);

Queries 1:

Find all the users who wrote a post that was categorized as "Other"

Expected Output :
╒════════╤══════════════╤══════════╕
│"user"  │"post_heading"│"category"│
╞════════╪══════════════╪══════════╡
│"Ramesh"│"Tiring Day!" │"Other"   │
└────────┴──────────────┴──────────┘

Query 2:

Find all the users who wrote a post that was categorized as "Celebration" or "Travel"

Expected Output :
╒══════════╤════════════════════════╤═════════════╕
│"user"    │"post_heading"          │"category"   │
╞══════════╪════════════════════════╪═════════════╡
│"Alex"    │"Trip to Indy"          │"Travel"     │
├──────────┼────────────────────────┼─────────────┤
│"Jia Li"  │"Celebrated my Birthday"│"Celebration"│
├──────────┼────────────────────────┼─────────────┤
│"Jennifer"│"Visiting LA"           │"Travel"     │
└──────────┴────────────────────────┴─────────────┘

Query 3:

Find the users who rated or commented on post with heading "Trip to Indy"

Expected Output :
╒═══════════╤════════════════════╤══════════════╕
│"user"     │"rated_or_commented"│"post_heading"│
╞═══════════╪════════════════════╪══════════════╡
│"Jia Li"   │"Rated"             │"Trip to Indy"│
├───────────┼────────────────────┼──────────────┤
│"Elizabeth"│"Rated"             │"Trip to Indy"│
├───────────┼────────────────────┼──────────────┤
│"Newton"   │"Rated"             │"Trip to Indy"│
├───────────┼────────────────────┼──────────────┤
│"Jennifer" │"Rated"             │"Trip to Indy"│
├───────────┼────────────────────┼──────────────┤
│"Alex"     │"Commented"         │"Trip to Indy"│
└───────────┴────────────────────┴──────────────┘

Query 4:

Find the users who rated a post of a user that they follow

Expected Output :
╒════════════╤══════════════╤═════════════╕
│"user_rated"│"post_heading"│"user_posted"│
╞════════════╪══════════════╪═════════════╡
│"Ramesh"    │"Visiting LA" │"Jennifer"   │
└────────────┴──────────────┴─────────────┘

Query 5:

Find the posts with average rating greater than 3.5

Expected Output :
╒══════════════╤═════════╕
│"post_heading"│"average"│
╞══════════════╪═════════╡
│"Tiring Day!" │4.0      │
├──────────────┼─────────┤
│"Visiting LA" │5.0      │
├──────────────┼─────────┤
│"Boiler Up!"  │5.0      │
└──────────────┴─────────┘

Query 6:

List all the category, location pairs and the number of posts that correspond to each such pair

Expected Output :
╒════════════════╤═════════════╤════════════╕
│"location"      │"category"   │"post_count"│
╞════════════════╪═════════════╪════════════╡
│"West Lafayette"│"Travel"     │1           │
├────────────────┼─────────────┼────────────┤
│"West Lafayette"│"Celebration"│1           │
├────────────────┼─────────────┼────────────┤
│"West Lafayette"│"Other"      │1           │
├────────────────┼─────────────┼────────────┤
│"West Lafayette"│"Festival"   │1           │
├────────────────┼─────────────┼────────────┤
│"Chicago"       │"Travel"     │1           │
└────────────────┴─────────────┴────────────┘

Query 7:

For each category, location pair, find the number of posts that correspond to each such pair. This time only consider posts that have received at least one 5 star rating.

Expected Output :
╒══════════╤══════════╤════════════╕
│"location"│"category"│"post_count"│
╞══════════╪══════════╪════════════╡
│"Chicago" │"Travel"  │1           │
└──────────┴──────────┴────────────┘

Query 8:

For each post, find the number of users who posted comment(s) on it and the number of users who rated it

Expected Output :
╒════════════════════════╤═════════════╤═════════════════╕
│"post_heading"          │"rated_count"│"commented_count"│
╞════════════════════════╪═════════════╪═════════════════╡
│"Trip to Indy"          │4            │1                │
├────────────────────────┼─────────────┼─────────────────┤
│"Celebrated my Birthday"│2            │1                │
├────────────────────────┼─────────────┼─────────────────┤
│"Tiring Day!"           │1            │1                │
├────────────────────────┼─────────────┼─────────────────┤
│"Visiting LA"           │3            │1                │
├────────────────────────┼─────────────┼─────────────────┤
│"Boiler Up!"            │1            │0                │
├────────────────────────┼─────────────┼─────────────────┤
│"Studying!"             │0            │1                │
├────────────────────────┼─────────────┼─────────────────┤
│"Sleepy!"               │0            │0                │
└────────────────────────┴─────────────┴─────────────────┘

Query 9:

Count the number of 5-star ratings for posts written by each user. Consider only posts submitted from Chicago (location is Chicago). 

Expected Output :
╒══════════╤══════════════════════════════════════════════╕
│"user"    │"5-star_ratings_for_posts_written_by_the_user"│
╞══════════╪══════════════════════════════════════════════╡
│"Jennifer"│  3                                           │
└──────────┴──────────────────────────────────────────────┘



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